Teijibo majima



T. MAJIMA.

CELL PLATE.

APPLICATION FILED on. 11-. law.

Patented June 24, 1919- TELTIRQ MAJIMA, OF I-IYOG-O-KEN, JAPAN.

CELIrPLATE.

Specification of Letters'Patent. I Patented June 2%, 19119,

Application filed October 11, 1918. Serial No. 257,735.

To all whom it may concern.

Be it known that I, TEIJIRo MAJIMA, a subject of the Emperor of Japan, and a resident of No. 1144 Mikage-Machi, MukO-Gun,

, Hyogo-Ken, Empire of Japan, have invented new and useful Improvements in Cell- Plates, of which the following is a specification.

This invention relates to electric cell plates, and consists in an improved manufacture of plate whereby vthe weight is considerably reduced; the improved plates being especially applicable for use in submarine boats, trains, and like places where the weight and space are considerations. lhe improved plates are also more durable, and are capable of more rapid and economical production in comparison with plates constructed in the heretofore known manner.

Another object of the invention is to provide plates which will obviate short circuits between two terminal plates without interposing distanc plates. Further, by reason of the nature of the material used in the construction'of the improved plates, they are not liable to be deformed or distorted when in use, and they can also be easily constructed or assembled without skilled labor.

These results are obtained by using a composite plate, the body of which is produced from material which is lighter than the metal usually employed in cell plates, and which is immune to the charging and discharging action of the electric current, such as porcelain, or other earthenware; this porcelain or like body or core being entirely covered with-a thin layer of lead except at the distance pieces which are integrally formed upon one side of the plate.

Such composite plates are considerably lighter than the ordinary metallic plates. They are also acid proof and obviously very durable and not liable to be bent or deformed by the charging and discharging action of the electric current.

The accompanying drawings illustrate, by the way of example, one application of the invention.

Figure 1 is a perspective view of a comgosite plate of the Tudor type, wherein the istance pieces that are integrally formed on the porcelain or like body are not covered with the lead layer or casing.

Fig. 2 is a perspective view of a series of assembled plates.

In these drawings, the plate is designated by the reference numeral 1, and is made essentially of an acid-proof material-which is lighter than the ordinary cell plate metal, such, for example, as porcelain or earthenware.

The material selected, which constitutes the body or core of the plate, is entirely covcred or sheathed with a thin layerof commercial lead 3, with the exception of the plate either by simply spraying thereon a solution oflead or by electro-plating. lhe latter method which is preferred and more certain is accomplished by employing as an electrolyte, a bath of silicon fluorid of lead. It is important beforehand to cover the plate to be operated upon with gold, which may be in the form of gold paint and applied by a brush, in order to insure better deposition of the lead as the plate in its original form is a bad conductor. Before subjecting the plate to the electro-plating process, the distance pieces are covered with wax or ptherwise prevented from being coated with ead.

The composite plates are adapted to be assembled in the usual manner as shown in Fig. 2.

In some instances, besides leaving the disstance pieces uncovered, a narrow strip or portion, centrally dividing and extending between the top and bottom edges of the plate may be likewise left uncovered for the purpose of dividing the plate into negative and positive sections'on opposite sides of the strip. 1 p

The application of my invention to other types of cell plates diiiers in no essential respect from its application to plates of the Tudor'type as shown in the drawings.

Having now particularly described and 92% LSQ7AO? ascertained the nature of my said invention, and in What manner the same is to be performed, I declare that what I claim is A composite cell-plate, consisting of a body formed with distance pieces, such body being of porcelain 0r earthenware which is entirely covered with a, thin sheathing of lead with the exception of the distance pieces, which are integral with the said body or core, and are left exposed. 10 In testimony whereof I aiiix my signature in presence of two witnesses.

TEIJIRO MAJIMA. Witnesses HARNTADE YAsUMiIw, K. 1T0. 

